Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 1 | #ifndef _NF_CONNTRACK_TIMEOUT_H |
| 2 | #define _NF_CONNTRACK_TIMEOUT_H |
| 3 | |
| 4 | #include <net/net_namespace.h> |
| 5 | #include <linux/netfilter/nf_conntrack_common.h> |
| 6 | #include <linux/netfilter/nf_conntrack_tuple_common.h> |
| 7 | #include <net/netfilter/nf_conntrack.h> |
| 8 | #include <net/netfilter/nf_conntrack_extend.h> |
| 9 | |
| 10 | #define CTNL_TIMEOUT_NAME_MAX 32 |
| 11 | |
| 12 | struct ctnl_timeout { |
| 13 | struct list_head head; |
| 14 | struct rcu_head rcu_head; |
| 15 | atomic_t refcnt; |
| 16 | char name[CTNL_TIMEOUT_NAME_MAX]; |
| 17 | __u16 l3num; |
| 18 | __u8 l4num; |
| 19 | char data[0]; |
| 20 | }; |
| 21 | |
| 22 | struct nf_conn_timeout { |
| 23 | struct ctnl_timeout *timeout; |
| 24 | }; |
| 25 | |
| 26 | #define NF_CT_TIMEOUT_EXT_DATA(__t) (unsigned int *) &((__t)->timeout->data) |
| 27 | |
| 28 | static inline |
| 29 | struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct) |
| 30 | { |
| 31 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 32 | return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT); |
| 33 | #else |
| 34 | return NULL; |
| 35 | #endif |
| 36 | } |
| 37 | |
| 38 | static inline |
| 39 | struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct, |
| 40 | struct ctnl_timeout *timeout, |
| 41 | gfp_t gfp) |
| 42 | { |
| 43 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 44 | struct nf_conn_timeout *timeout_ext; |
| 45 | |
| 46 | timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp); |
| 47 | if (timeout_ext == NULL) |
| 48 | return NULL; |
| 49 | |
| 50 | timeout_ext->timeout = timeout; |
| 51 | |
| 52 | return timeout_ext; |
| 53 | #else |
| 54 | return NULL; |
| 55 | #endif |
| 56 | }; |
| 57 | |
| 58 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 59 | extern int nf_conntrack_timeout_init(struct net *net); |
| 60 | extern void nf_conntrack_timeout_fini(struct net *net); |
| 61 | #else |
| 62 | static inline int nf_conntrack_timeout_init(struct net *net) |
| 63 | { |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static inline void nf_conntrack_timeout_fini(struct net *net) |
| 68 | { |
| 69 | return; |
| 70 | } |
| 71 | #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ |
| 72 | |
| 73 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 74 | extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(const char *name); |
| 75 | extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout); |
| 76 | #endif |
| 77 | |
| 78 | #endif /* _NF_CONNTRACK_TIMEOUT_H */ |